build: Remove --test-wasm-stdlib option

We already adopted wasi-libc 27, which includes the necessary fix for
null builds, so we no longer need a way to run wasm tests without
building. Also removing the logic that unintentionally enforced
`--test-wasm-stdlib` whenever `--build-wasm-stdlib` was specified.

Author: kateinoigakukun

utils/build_swift/build_swift/driver_arguments.py

@@ -295,9 +295,6 @@ def _apply_default_arguments(args):
         args.test_xros_host = False
         args.test_android_host = False
 
-    if args.build_wasmstdlib:
-        args.test_wasmstdlib = True
-
 
 def create_argument_parser():
     """Return a configured argument parser."""
@@ -862,8 +859,6 @@ def create_argument_parser():
     option(['--build-wasm-stdlib'], toggle_true('build_wasmstdlib'),
            help='build the stdlib for WebAssembly target into a'
                 'separate build directory ')
-    option('--test-wasm-stdlib', toggle_true('test_wasmstdlib'),
-           help='test stdlib for WebAssembly')
     option(['--wasmkit'], toggle_true('build_wasmkit'),
            help='build WasmKit')
     option(['--install-wasmkit'], toggle_true('install_wasmkit'),

utils/swift_build_support/swift_build_support/build_script_invocation.py

@@ -685,9 +685,7 @@ def compute_product_pipelines(self):
         builder.add_product(products.WasmKit,
                             is_enabled=self.args.build_wasmkit)
         builder.add_product(products.WasmStdlib,
-                            # Revert `or self.args.test_wasmstdlib` once we adopt `wasi-sdk-26`
-                            # or higher version that includes https://github.com/WebAssembly/wasi-libc/commit/eadb436d5c09f7983c3a687086e5af6b6e9f5510.patch
-                            is_enabled=self.args.build_wasmstdlib or self.args.test_wasmstdlib)
+                            is_enabled=self.args.build_wasmstdlib)
         builder.add_product(products.WasmThreadsStdlib,
                             is_enabled=self.args.build_wasmstdlib)
         builder.add_product(products.WasmSwiftSDK,